./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/gcd_3+newton_2_7.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/gcd_3+newton_2_7.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a7443921b0608d3c2ff1c61e12bf7cf129e5c1aecf22f0fb9785817b90c162e7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 19:50:03,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 19:50:03,346 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 19:50:03,396 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 19:50:03,397 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 19:50:03,398 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 19:50:03,399 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 19:50:03,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 19:50:03,403 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 19:50:03,409 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 19:50:03,410 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 19:50:03,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 19:50:03,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 19:50:03,414 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 19:50:03,415 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 19:50:03,418 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 19:50:03,418 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 19:50:03,420 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 19:50:03,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 19:50:03,425 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 19:50:03,427 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 19:50:03,428 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 19:50:03,429 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 19:50:03,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 19:50:03,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 19:50:03,432 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 19:50:03,433 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 19:50:03,433 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 19:50:03,434 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 19:50:03,434 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 19:50:03,435 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 19:50:03,435 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 19:50:03,436 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 19:50:03,436 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 19:50:03,437 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 19:50:03,438 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 19:50:03,439 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 19:50:03,439 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 19:50:03,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 19:50:03,440 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 19:50:03,440 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 19:50:03,442 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 19:50:03,442 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 19:50:03,478 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 19:50:03,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 19:50:03,479 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 19:50:03,479 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 19:50:03,480 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 19:50:03,480 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 19:50:03,480 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 19:50:03,481 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 19:50:03,481 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 19:50:03,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 19:50:03,482 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 19:50:03,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 19:50:03,482 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 19:50:03,482 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 19:50:03,482 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 19:50:03,483 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 19:50:03,483 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 19:50:03,483 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 19:50:03,483 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 19:50:03,483 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 19:50:03,484 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 19:50:03,484 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 19:50:03,484 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 19:50:03,484 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 19:50:03,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 19:50:03,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 19:50:03,485 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 19:50:03,485 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 19:50:03,485 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 19:50:03,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 19:50:03,486 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 19:50:03,486 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 19:50:03,486 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 19:50:03,486 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a7443921b0608d3c2ff1c61e12bf7cf129e5c1aecf22f0fb9785817b90c162e7 [2022-07-19 19:50:03,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 19:50:03,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 19:50:03,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 19:50:03,742 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 19:50:03,742 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 19:50:03,743 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_3+newton_2_7.i [2022-07-19 19:50:03,795 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/272fa1724/840de981efce470ea65ac0be1da341cf/FLAGb857cb73d [2022-07-19 19:50:04,193 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 19:50:04,194 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_3+newton_2_7.i [2022-07-19 19:50:04,202 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/272fa1724/840de981efce470ea65ac0be1da341cf/FLAGb857cb73d [2022-07-19 19:50:04,220 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/272fa1724/840de981efce470ea65ac0be1da341cf [2022-07-19 19:50:04,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 19:50:04,223 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 19:50:04,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 19:50:04,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 19:50:04,230 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 19:50:04,230 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 07:50:04" (1/1) ... [2022-07-19 19:50:04,231 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c5c54db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:50:04, skipping insertion in model container [2022-07-19 19:50:04,231 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 07:50:04" (1/1) ... [2022-07-19 19:50:04,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 19:50:04,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 19:50:04,397 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_3+newton_2_7.i[1226,1239] [2022-07-19 19:50:04,418 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_3+newton_2_7.i[2841,2854] [2022-07-19 19:50:04,423 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 19:50:04,435 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 19:50:04,451 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_3+newton_2_7.i[1226,1239] [2022-07-19 19:50:04,468 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_3+newton_2_7.i[2841,2854] [2022-07-19 19:50:04,471 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 19:50:04,482 INFO L208 MainTranslator]: Completed translation [2022-07-19 19:50:04,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:50:04 WrapperNode [2022-07-19 19:50:04,483 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 19:50:04,484 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 19:50:04,484 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 19:50:04,484 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 19:50:04,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:50:04" (1/1) ... [2022-07-19 19:50:04,503 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:50:04" (1/1) ... [2022-07-19 19:50:04,528 INFO L137 Inliner]: procedures = 27, calls = 16, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 77 [2022-07-19 19:50:04,529 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 19:50:04,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 19:50:04,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 19:50:04,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 19:50:04,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:50:04" (1/1) ... [2022-07-19 19:50:04,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:50:04" (1/1) ... [2022-07-19 19:50:04,540 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:50:04" (1/1) ... [2022-07-19 19:50:04,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:50:04" (1/1) ... [2022-07-19 19:50:04,555 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:50:04" (1/1) ... [2022-07-19 19:50:04,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:50:04" (1/1) ... [2022-07-19 19:50:04,563 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:50:04" (1/1) ... [2022-07-19 19:50:04,565 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 19:50:04,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 19:50:04,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 19:50:04,567 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 19:50:04,569 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:50:04" (1/1) ... [2022-07-19 19:50:04,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 19:50:04,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 19:50:04,595 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 19:50:04,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 19:50:04,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 19:50:04,627 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-07-19 19:50:04,627 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-07-19 19:50:04,627 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-07-19 19:50:04,628 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-07-19 19:50:04,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 19:50:04,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 19:50:04,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 19:50:04,681 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 19:50:04,682 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 19:50:04,846 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 19:50:04,858 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 19:50:04,858 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 19:50:04,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 07:50:04 BoogieIcfgContainer [2022-07-19 19:50:04,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 19:50:04,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 19:50:04,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 19:50:04,866 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 19:50:04,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 07:50:04" (1/3) ... [2022-07-19 19:50:04,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4adddd48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 07:50:04, skipping insertion in model container [2022-07-19 19:50:04,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:50:04" (2/3) ... [2022-07-19 19:50:04,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4adddd48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 07:50:04, skipping insertion in model container [2022-07-19 19:50:04,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 07:50:04" (3/3) ... [2022-07-19 19:50:04,869 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_2_7.i [2022-07-19 19:50:04,880 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 19:50:04,880 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-19 19:50:04,927 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 19:50:04,933 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@13428241, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c40e91d [2022-07-19 19:50:04,933 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 19:50:04,937 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-19 19:50:04,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 19:50:04,942 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 19:50:04,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 19:50:04,943 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 19:50:04,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 19:50:04,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2022-07-19 19:50:04,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 19:50:04,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978417342] [2022-07-19 19:50:04,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 19:50:04,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 19:50:05,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:50:05,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 19:50:05,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 19:50:05,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978417342] [2022-07-19 19:50:05,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978417342] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 19:50:05,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 19:50:05,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 19:50:05,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963729259] [2022-07-19 19:50:05,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 19:50:05,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 19:50:05,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 19:50:05,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 19:50:05,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 19:50:05,166 INFO L87 Difference]: Start difference. First operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 19:50:05,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 19:50:05,211 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2022-07-19 19:50:05,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 19:50:05,213 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-19 19:50:05,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 19:50:05,218 INFO L225 Difference]: With dead ends: 90 [2022-07-19 19:50:05,218 INFO L226 Difference]: Without dead ends: 36 [2022-07-19 19:50:05,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 19:50:05,224 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 23 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 19:50:05,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 119 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 19:50:05,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-19 19:50:05,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2022-07-19 19:50:05,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-19 19:50:05,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-07-19 19:50:05,254 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 11 [2022-07-19 19:50:05,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 19:50:05,255 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-07-19 19:50:05,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 19:50:05,259 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-07-19 19:50:05,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 19:50:05,260 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 19:50:05,260 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 19:50:05,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 19:50:05,261 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 19:50:05,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 19:50:05,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1776235347, now seen corresponding path program 1 times [2022-07-19 19:50:05,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 19:50:05,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038379402] [2022-07-19 19:50:05,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 19:50:05,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 19:50:05,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:50:05,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 19:50:05,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 19:50:05,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038379402] [2022-07-19 19:50:05,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038379402] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 19:50:05,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 19:50:05,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 19:50:05,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445114836] [2022-07-19 19:50:05,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 19:50:05,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 19:50:05,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 19:50:05,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 19:50:05,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 19:50:05,338 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 19:50:05,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 19:50:05,392 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-07-19 19:50:05,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 19:50:05,393 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-19 19:50:05,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 19:50:05,394 INFO L225 Difference]: With dead ends: 36 [2022-07-19 19:50:05,394 INFO L226 Difference]: Without dead ends: 30 [2022-07-19 19:50:05,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-19 19:50:05,396 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 19:50:05,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 130 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 19:50:05,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-19 19:50:05,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-07-19 19:50:05,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-19 19:50:05,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-07-19 19:50:05,402 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2022-07-19 19:50:05,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 19:50:05,402 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-07-19 19:50:05,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 19:50:05,403 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-07-19 19:50:05,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-19 19:50:05,403 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 19:50:05,404 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 19:50:05,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 19:50:05,404 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 19:50:05,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 19:50:05,405 INFO L85 PathProgramCache]: Analyzing trace with hash 830014046, now seen corresponding path program 1 times [2022-07-19 19:50:05,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 19:50:05,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553634814] [2022-07-19 19:50:05,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 19:50:05,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 19:50:05,422 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 19:50:05,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1350623434] [2022-07-19 19:50:05,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 19:50:05,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 19:50:05,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 19:50:05,428 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 19:50:05,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 19:50:05,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:50:05,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-19 19:50:05,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 19:50:26,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 19:50:26,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 19:50:37,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 19:50:37,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 19:50:37,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553634814] [2022-07-19 19:50:37,281 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 19:50:37,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350623434] [2022-07-19 19:50:37,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350623434] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 19:50:37,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 19:50:37,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-07-19 19:50:37,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977563106] [2022-07-19 19:50:37,282 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 19:50:37,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 19:50:37,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 19:50:37,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 19:50:37,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=211, Unknown=7, NotChecked=0, Total=272 [2022-07-19 19:50:37,286 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 19:50:37,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 19:50:37,655 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-07-19 19:50:37,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 19:50:37,656 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-19 19:50:37,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 19:50:37,657 INFO L225 Difference]: With dead ends: 42 [2022-07-19 19:50:37,657 INFO L226 Difference]: Without dead ends: 33 [2022-07-19 19:50:37,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=74, Invalid=261, Unknown=7, NotChecked=0, Total=342 [2022-07-19 19:50:37,659 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 19:50:37,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 231 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2022-07-19 19:50:37,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-19 19:50:37,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2022-07-19 19:50:37,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-19 19:50:37,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-07-19 19:50:37,664 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 12 [2022-07-19 19:50:37,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 19:50:37,664 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-07-19 19:50:37,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 19:50:37,664 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-07-19 19:50:37,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-19 19:50:37,665 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 19:50:37,665 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 19:50:37,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 19:50:37,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 19:50:37,880 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 19:50:37,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 19:50:37,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1561924787, now seen corresponding path program 2 times [2022-07-19 19:50:37,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 19:50:37,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584737657] [2022-07-19 19:50:37,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 19:50:37,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 19:50:37,889 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 19:50:37,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487655088] [2022-07-19 19:50:37,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 19:50:37,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 19:50:37,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 19:50:37,892 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 19:50:37,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 19:50:37,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 19:50:37,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 19:50:37,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-19 19:50:37,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 19:50:59,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 19:50:59,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 19:52:14,565 WARN L833 $PredicateComparison]: unable to prove that (or (<= |c_ULTIMATE.start_main1_~x~0#1| 0) (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (or (= |ULTIMATE.start_gcd_test_~b#1| 0) (let ((.cse12 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse13 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse9 (< |ULTIMATE.start_gcd_test_~b#1| 0)) (.cse17 (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse12) 256))) (let ((.cse14 (mod .cse12 256)) (.cse16 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse12) 256)) (.cse0 (not (<= .cse17 127))) (.cse1 (not .cse9)) (.cse3 (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse17) 256) 0))) (.cse4 (not .cse13)) (.cse5 (<= .cse17 |c_ULTIMATE.start_main1_~x~0#1|))) (let ((.cse8 (or .cse0 .cse1 .cse3 .cse4 .cse5)) (.cse10 (<= .cse16 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse11 (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse16) 256) 0))) (.cse7 (not (<= .cse16 127))) (.cse15 (<= .cse14 127))) (and (or (let ((.cse6 (or .cse13 (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse14) 256) 0)) (<= .cse14 |c_ULTIMATE.start_main1_~x~0#1|))) (.cse2 (= .cse12 0))) (and (or .cse0 (and (or .cse1 .cse2 .cse3 .cse4 .cse5) .cse6)) .cse6 (or .cse7 (and .cse8 .cse6 (or .cse9 (and .cse6 (or .cse10 .cse11 .cse2 .cse4))))))) (not .cse15)) (or (and .cse8 (or .cse10 .cse9 .cse11 .cse7 .cse4)) .cse15))))))))) is different from false [2022-07-19 19:52:32,235 WARN L855 $PredicateComparison]: unable to prove that (or (<= |c_ULTIMATE.start_main1_~x~0#1| 0) (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (or (= |ULTIMATE.start_gcd_test_~b#1| 0) (let ((.cse12 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse7 (mod .cse12 256)) (.cse6 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse14 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse12) 256)) (.cse9 (< |ULTIMATE.start_gcd_test_~b#1| 0)) (.cse15 (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse12) 256))) (let ((.cse0 (not (<= .cse15 127))) (.cse1 (not .cse9)) (.cse3 (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse15) 256) 0))) (.cse5 (<= .cse15 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse8 (<= .cse14 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse10 (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse14) 256) 0))) (.cse11 (not (<= .cse14 127))) (.cse4 (not .cse6)) (.cse13 (<= .cse7 127))) (and (or (let ((.cse2 (= .cse12 0))) (and (or .cse0 .cse1 .cse2 .cse3 .cse4 .cse5) (or .cse6 (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse7) 256) 0)) (<= .cse7 |c_ULTIMATE.start_main1_~x~0#1|)) (or .cse8 .cse9 .cse10 .cse2 .cse11 .cse4))) (not .cse13)) (or (and (or .cse0 .cse1 .cse3 .cse4 .cse5) (or .cse8 .cse9 .cse10 .cse11 .cse4)) .cse13)))))))) is different from true [2022-07-19 19:52:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-07-19 19:52:39,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 19:52:39,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584737657] [2022-07-19 19:52:39,802 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 19:52:39,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487655088] [2022-07-19 19:52:39,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487655088] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 19:52:39,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 19:52:39,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2022-07-19 19:52:39,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172439237] [2022-07-19 19:52:39,803 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 19:52:39,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 19:52:39,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 19:52:39,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 19:52:39,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=186, Unknown=7, NotChecked=58, Total=306 [2022-07-19 19:52:39,804 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 19:52:41,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 19:52:41,094 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-07-19 19:52:41,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 19:52:41,095 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-19 19:52:41,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 19:52:41,095 INFO L225 Difference]: With dead ends: 42 [2022-07-19 19:52:41,095 INFO L226 Difference]: Without dead ends: 33 [2022-07-19 19:52:41,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=55, Invalid=186, Unknown=7, NotChecked=58, Total=306 [2022-07-19 19:52:41,097 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 19:52:41,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 241 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 52 Unchecked, 0.6s Time] [2022-07-19 19:52:41,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-19 19:52:41,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-07-19 19:52:41,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-19 19:52:41,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-07-19 19:52:41,101 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 13 [2022-07-19 19:52:41,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 19:52:41,102 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-07-19 19:52:41,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 19:52:41,102 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-07-19 19:52:41,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-19 19:52:41,103 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 19:52:41,103 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 19:52:41,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 19:52:41,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-19 19:52:41,312 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 19:52:41,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 19:52:41,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1767906835, now seen corresponding path program 3 times [2022-07-19 19:52:41,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 19:52:41,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745574473] [2022-07-19 19:52:41,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 19:52:41,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 19:52:41,322 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 19:52:41,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1896095977] [2022-07-19 19:52:41,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 19:52:41,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 19:52:41,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 19:52:41,328 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 19:52:41,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 19:52:41,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 19:52:41,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 19:52:41,436 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-19 19:52:41,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 19:53:04,216 WARN L833 $PredicateComparison]: unable to prove that (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse2 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_20|) 256))) (let ((.cse1 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse2) 256))) (let ((.cse0 (mod .cse1 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (= (mod .cse0 256) |c_ULTIMATE.start_gcd_test_~b#1|) (= .cse0 0) (not (= .cse1 0)) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod .cse2 .cse1) 256)) (<= .cse2 127)))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse3 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_20|) 256))) (let ((.cse7 (+ (- 256) .cse3))) (let ((.cse5 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse7) 256))) (let ((.cse4 (mod .cse7 .cse5)) (.cse6 (mod .cse5 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (not (<= .cse3 127)) (not (= .cse4 0)) (= |c_ULTIMATE.start_gcd_test_~a#1| (+ (mod (+ (* 255 .cse5) .cse4) 256) (- 256))) (= (mod .cse6 256) |c_ULTIMATE.start_gcd_test_~b#1|) (= .cse6 0) (not (= .cse5 0)))))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse9 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_20|) 256))) (let ((.cse8 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse9) 256))) (and (= (mod (mod .cse8 |c_ULTIMATE.start_gcd_test_~a#1|) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (not (= .cse8 0)) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod .cse9 .cse8) 256)) (<= .cse9 127))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse10 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_20|) 256))) (let ((.cse13 (+ (- 256) .cse10))) (let ((.cse12 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse13) 256))) (let ((.cse11 (mod .cse13 .cse12))) (and (not (<= .cse10 127)) (not (= .cse11 0)) (= |c_ULTIMATE.start_gcd_test_~a#1| (+ (mod (+ (* 255 .cse12) .cse11) 256) (- 256))) (= (mod (mod .cse12 |c_ULTIMATE.start_gcd_test_~a#1|) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (not (= .cse12 0))))))))) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)) (not (< |c_ULTIMATE.start_main1_~x~0#1| 0))) is different from false